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CT guided TMJ biopsy

Date: Dec 23, 2022


"Patient underwent CT-guided biopsy of synovium of left temporal mandibular joint. Limited CT scan of neck was performed, and thickened synovium containing numerous calcifications within the left temporal mandibular joint was localized. A 19 gauge guiding needle was advanced to the periphery of the TMJ, and three cores were obtained with a 20 gauge Tru-Cut biopsy needle."  

Provider wants to use unlisted code 21299, but I want to make sure there is not a better code to use for this. If not, what CPT code would this be comparable to for the unlisted?

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